| Summary: | The Gendol river in Sleman Regency district is one of a river that flows in merapi volcano and prone to lahar flooding. One of the efforts may be conducted for tackling this was a contingency plan. The aim of this research is to know number of affected aspect consist of people, settlement, infrastructure, livestock and farming, to asses the level of capacity and suceptibility in the research area, and also composing a contingency plan based on the element of risk data affected areas of two scenarios that there have been namely lahar discharge scenario and lahar volume scenario from the previous research
Methods used in this research is a method of survey research and observation at the research field. Sampling in the study is done using quota of sampling methods, the number of samples as much as 95 respondents to know susceptibility in research area. Vulnerability in this research area measured based on the affected area by two scenario which cover population, settlement, infrastructure, livestock, and agricultural land. Vulnerability measured based on the historical data from the occurrence of lahar flood and the height of lahar flood in the research area. To compose contingency planning the result of affected aspect is used to make the estimate of resource needed in the simulation
This research result indicates that suffered areas lahar discharge scenario is less than suffered area with volume scenario. Suffered areas lahar discharge scenario is 966,93 ha or 33,91 % of total region, 1111 house, 4444 people, 6 bridge, 1 market, 326 goat and 584 cow and 1.847.719 m2 agricultural land, 444 people and a number of health services. Suffered areas lahar volume scenario is 1401,44 ha or 49, 16 % of the total region, 2695 house, 10.780 people, 6 bridge, 3 school, 1 market, 1312 goat, 2585 cow and 3.667.241 m2 agricultural and a number of 1078 people need medical services. Both this scenario has become the base of the contingency plan as stipulated in the sectoral plans like command operation, health, infrastructure of barracks, logistics, communication, education, and livestock. In this sectoral planning there is a gap in resources that are needed and resources available is in secretariat sector, barrack sector and health sector.
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